2026-06-28T15:20:03Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/522222023-08-28T09:51:19Zcom_20.500.14352_14col_20.500.14352_15

Modulation-frequency-controlled change from sub- to superluminal regime in highly doped erbium fibers Melle Hernández, Sonia Gómez Calderón, Óscar Caro, César E. Cabrera Granado, Eduardo Antón Revilla, Miguel Ángel Carreño Sánchez, Fernando Received December 11, 2007; revised March 4, 2008; accepted March 6, 2008; posted March 14, 2008 (Doc. ID 90388); published April 11, 2008 We report a change from sub- to superluminal propagation upon increasing the modulation frequency of an amplitude-modulated 1550 nm signal when propagating through highly doped erbium fibers pumped at 980 nm. We show that the interplay between the pump absorption and the pump-power broadening of the spectral hole induced by coherent population oscillations may drastically affect the fractional advancement or delay of the signal for the considered fibers. 2023-06-20T12:41:17Z 2023-06-20T12:41:17Z 2008-04-15 journal article 0146-9592 10.1364/OL.33.000827 https://hdl.handle.net/20.500.14352/52222 https://doi.org/10.1364/OL.33.000827 https://www.osapublishing.org/ol/abstract.cfm?uri=ol-33-8-827#Abstract eng FIS2004- 03267 PR27/05-14019 GR96/06 restricted access Optical Society of America